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Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Phlogopite from
Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA


08482030017367015068873.jpg
Phlogopite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
04461330017806008957478.jpg
Phlogopite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
05877940017272016824774.jpg
Phlogopite

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
09543610017361021715041.jpg
Phlogopite

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
08482030017367015068873.jpg
Phlogopite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
04795850017367424347315.jpg
Phlogopite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
05877940017272016824774.jpg
Phlogopite

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
08832700017806008951135.jpg
Phlogopite

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
04632660017367424372822.jpg
Phlogopite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
08346820017367424382868.jpg
Phlogopite, etc.

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
05877940017272016824774.jpg
Phlogopite

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
04273340017806008966855.jpg
Phlogopite

Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
Locality type:Mine
Classification
Species:Phlogopite
Formula:KMg3(AlSi3O10)(OH)2
Comments:Plates of crystals occur on serpentine, partially altered to serpentine
Habit:tabular
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Chondrodite5
Muscovite5
Clinochlore5
Calcite5
Magnetite3
Biotite1
Dolomite1
Actinolite1
Data
Mineral Data:Click here to view Phlogopite data
Locality Data:Click here to view Tilly Foster Iron Mine, Town of Southeast, Putnam County, New York, USA
Photo GalleryView Gallery (8 photos)
Data Identifiers
Mindat Occurrence Record ID:100229
Long-form Identifier:1:3:100229:4
GUID (UUID V4):0
Nearest other occurrences of Phlogopite
10.1km (6.2 miles) ⓘMahopac Mines, Town of Carmel, Putnam County, New York, USA
11.6km (7.2 miles) ⓘTuckahoe and Patterson Marble Company Quarry, Town of Patterson, Putnam County, New York, USA
15.0km (9.3 miles) ⓘOil Mill Pond, Danbury, Fairfield County, Connecticut, USA
15.5km (9.6 miles) ⓘNorth Street mall, Danbury, Fairfield County, Connecticut, USA
17.8km (11.1 miles) ⓘOld Quarry Nature Center, Danbury, Fairfield County, Connecticut, USA
19.2km (12.0 miles) ⓘAgstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA
20.3km (12.6 miles) ⓘU. S. Route 7 Expressway (Brookfield Bypass), Brookfield, Fairfield County, Connecticut, USA
21.0km (13.1 miles) ⓘU. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
22.9km (14.2 miles) ⓘShaft 7, Delaware Aqueduct, Town of Fishkill, Dutchess County, New York, USA
26.3km (16.4 miles) ⓘAdvance Stone Quarry, Boardman's Bridge, New Milford, Litchfield County, Connecticut, USA
References
(Januzzi, 1966, 1989) (Trainer, 1938).
Jensen (1978) Minerals of New York State, 42-43
 
and/or  
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